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Subject[PATCH v5 3/3] usb: xhci: remove stop device and ring doorbell in hub control and bus suspend
Date
There is no need to call xhci_stop_device() and xhci_ring_device() in
hub control and bus suspend functions since all device suspend and
resume have been notified through device_suspend/device_resume interfaces.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/usb/host/xhci-hub.c | 47 ---------------------------------------------
1 file changed, 47 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index a83e82e..f12e1b7 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -704,7 +704,6 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u32 temp, status;
int retval = 0;
__le32 __iomem **port_array;
- int slot_id;
struct xhci_bus_state *bus_state;
u16 link_state = 0;
u16 wake_mask = 0;
@@ -818,17 +817,6 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
goto error;
}

- slot_id = xhci_find_slot_id_by_port(hcd, xhci,
- wIndex + 1);
- if (!slot_id) {
- xhci_warn(xhci, "slot_id is zero\n");
- goto error;
- }
- /* unlock to execute stop endpoint commands */
- spin_unlock_irqrestore(&xhci->lock, flags);
- xhci_stop_device(xhci, slot_id, 1);
- spin_lock_irqsave(&xhci->lock, flags);
-
xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3);

spin_unlock_irqrestore(&xhci->lock, flags);
@@ -876,19 +864,6 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
goto error;
}

- if (link_state == USB_SS_PORT_LS_U3) {
- slot_id = xhci_find_slot_id_by_port(hcd, xhci,
- wIndex + 1);
- if (slot_id) {
- /* unlock to execute stop endpoint
- * commands */
- spin_unlock_irqrestore(&xhci->lock,
- flags);
- xhci_stop_device(xhci, slot_id, 1);
- spin_lock_irqsave(&xhci->lock, flags);
- }
- }
-
xhci_set_link_state(xhci, port_array, wIndex,
link_state);

@@ -994,14 +969,6 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
XDEV_U0);
}
bus_state->port_c_suspend |= 1 << wIndex;
-
- slot_id = xhci_find_slot_id_by_port(hcd, xhci,
- wIndex + 1);
- if (!slot_id) {
- xhci_dbg(xhci, "slot_id is zero\n");
- goto error;
- }
- xhci_ring_device(xhci, slot_id);
break;
case USB_PORT_FEAT_C_SUSPEND:
bus_state->port_c_suspend &= ~(1 << wIndex);
@@ -1133,20 +1100,12 @@ int xhci_bus_suspend(struct usb_hcd *hcd)
while (port_index--) {
/* suspend the port if the port is not suspended */
u32 t1, t2;
- int slot_id;

t1 = readl(port_array[port_index]);
t2 = xhci_port_state_to_neutral(t1);

if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) {
xhci_dbg(xhci, "port %d not suspended\n", port_index);
- slot_id = xhci_find_slot_id_by_port(hcd, xhci,
- port_index + 1);
- if (slot_id) {
- spin_unlock_irqrestore(&xhci->lock, flags);
- xhci_stop_device(xhci, slot_id, 1);
- spin_lock_irqsave(&xhci->lock, flags);
- }
t2 &= ~PORT_PLS_MASK;
t2 |= PORT_LINK_STROBE | XDEV_U3;
set_bit(port_index, &bus_state->bus_suspended);
@@ -1207,7 +1166,6 @@ int xhci_bus_resume(struct usb_hcd *hcd)
/* Check whether need resume ports. If needed
resume port and disable remote wakeup */
u32 temp;
- int slot_id;

temp = readl(port_array[port_index]);
if (DEV_SUPERSPEED(temp))
@@ -1240,11 +1198,6 @@ int xhci_bus_resume(struct usb_hcd *hcd)
/* Clear PLC */
xhci_test_and_clear_bit(xhci, port_array, port_index,
PORT_PLC);
-
- slot_id = xhci_find_slot_id_by_port(hcd,
- xhci, port_index + 1);
- if (slot_id)
- xhci_ring_device(xhci, slot_id);
} else
writel(temp, port_array[port_index]);
}
--
2.1.0


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